Hi, I wrote a simple C script in which sqrt() is used. The program compiles fine on Debian i686; however, on Ubuntu 11.10 AMD64, it can't be compiled: 1) if I compile it as 'gcc -Wall -g -m64 -lm64 -o foo foo.c', it complains: /usr/bin/ld: cannot find -lm64 collect2: ld returned 1 exit status 2) if I compile it as 'gcc -Wall -g -m64 -o foo foo.c', or 'gcc -Wall -g -m32 -lm -o foo foo.c', it complains: /dir/to/foo.c:15: undefined reference to `sqrt' collect2: ld returned 1 exit status Can someone offer me a hint? Thanks. Kind regards, Xianwen -- Please notice that my previous email address v9@xxxxxx is no longer accessible.
